May the Force be with them

David Prowse, the actor who played Darth Vader.

Before y'all get your noodles in a knot... Vader was a character of such magnitude, it took three actors to bring him to life. David Prowse in the costume, James Earl Jones for the voice and Sebastian Shaw when he was unmasked.

*Yoda voice* "There is another."
IIRC, there was a 4th actor who did the combat choreography.